idea to stop the DOS attack

Hi Peter and devs,
I was thinking about the recent flooding attacks on a couple of channels here.
Since the attacks appear to be from a single source and have a negative impact on virtually all other network nodes, we should be morally entitled and also technically capable to leverage our supermajority to run a one-off deanonymisation operation (simple intersection analysis) on the attacker's node and blackhole its traffic.
What do y'all reckon? Slippery slope or legitimate self-defense?